More noob questions z offset, material thickness, cutting path pauses, material hold down

First cut questions

Where do you input z offset for material thickness or anchor locations?

Is it possible to step through g code cutting instructions. I used Krabzcam to generate g codes and it separated out cutting operations but when I load them into maslow it doesn’t seem like I can easily pause between operations or run just one at a time. I know I could load each path separately I didn’t know if there was a way to step through them on the machine.

How important is it to screw down material or block it in place? I don’t want to interfere with the sled. Also how important is it to leave bridges when cutting pieces entirely free?

Thank you for any advice. Exciting to see it finally moving on its own.

Also I don’t know why it now seems to be unresponsive.

Also is the cool heat map the suggestion of how good the cutting area is? why is it asymmetrical from top to bottom? horizontal operation

Maslow-serial(20).log (15.4 KB)

First cut questions

Where do you input z offset for material thickness or anchor locations?

right now, you have to go to the fluidnc tab, click the right button (config
settings) and enter it there.

Is it possible to step through g code cutting instructions. I used Krabzcam
to generate g codes and it separated out cutting operations but when I load
them into maslow it doesn¢t seem like I can easily pause between operations or
run just one at a time. I know I could load each path separately I didn¢t know
if there was a way to step through them on the machine.

make each phase a separate file, then just load and run the files one at a time.

How important is it to screw down material or block it in place? I don¢t want
to interfere with the sled. Also how important is it to leave bridges when
cutting pieces entirely free?

‘it depends’

if your workpiece moves (or the parts shift after being cut free) that can
completely ruin your work

but sometimes your parts are heavy enough and have enough friction that you
don’t need to screw them down (using the silicon shelf liner between the parts
that are fixed and those that aren’t can help here)

you are correct about worrying about interfering with the sled movement. you
also want to be sure that you don’t run the bit into steel.

There are plastic nails available, and brass screws, both of which you can cut
through without damage

there is also double-sided tape.

the pieces that you cut free also have the force of the bit being applied to
them, so they are more likely to move, so not cutting it completely free is a
good idea.

some people use tabs, some people plan to not quite cut all the way through, and
then use a hand-held router with a flush cut but to cut the last of the way
through.

David Lang

Thank you

wouldchuck wrote:

Also is the cool heat map the suggestion of how good the cutting area is? why is it asymmetrical from top to bottom? horizontal operation

I’m pretty sure that heatmap assumes vertical

David Lang

I found the fluid cnc settings. which ones refer to the z position of anchors?

looking at this second log, it finds
Calibration values:
Fitness: 1.5913790540779247
Maslow_tlX: 3.2
Maslow_tlY: 2534.1
Maslow_trX: 4167.3
Maslow_trY: 2505.0
Maslow_blX: 0.0
Maslow_blY: 0.0
Maslow_brX: 4137.6
Maslow_brY: 0.0
altenate algorithm finds
x1 (B): 4073.2 ± 33.6 mm
x2 (C): 4057.9 ± 37.3 mm, y2 (C): 2655.7 ± 57.0 mm
x3 (E): 24.6 ± 5.9 mm, y3 (E): 2692.7 ± 56.5 mm

final results

Calibration values:
Fitness: 0.7915936553451887
Maslow_tlX: -6.8
Maslow_tlY: 2501.6
Maslow_trX: 4157.9
Maslow_trY: 2526.7
Maslow_blX: 0.0
Maslow_blY: 0.0
Maslow_brX: 4145.6
Maslow_brY: 0.0

x1 (B): 4165.5 ± 3.6 mm
x2 (C): 4140.9 ± 9.2 mm, y2 (C): 2520.9 ± 14.6 mm
x3 (E): -4.3 ± 3.3 mm, y3 (E): 2503.8 ± 9.3 mm

Which of those would I change in the fluid settings menu to change the z positions?

There are three sets of parameters.

  1. in the section where the anchor locations are stored, there are Z values for each anchor
  2. ahead of that there is a wasteboard setting
  3. next to the wasteboard setting is the workpiece thickness setting

you can actually split/combine these however you want, they all get added together

But the per-arm Z values are the distance from the arm to the bottom of the sled, you can leave those alone if your anchors are all at the same height

Then you can use the wasteboard setting for things that are fixed on the frame (i.e. put in the distance from the bottom of the belt ends at the anchor to the top of the wasteboard)

and finally, just adjust the workpiece thickness for your workpiece.

Thank you. I think I have found them now. Are the z positions labled as blz tlz trz and brz?

wouldchuck wrote:

Which of those would I change in the fluid settings menu to change the z
positions?

I would leave the per-arm Z values alone

I would use the wasteboard setting to put in the distance from the bottom of the
belt ends at the anchors to the top of the wasteboard (as I look at your frame,
this should just be the thickness of your wasteboard)

then I would do calibration just on the wasteboard.

When cutting, I would put in the workpiece thickness (although this is less
important than having theings right when running calibration)

David Lang

wouldchuck wrote:

Thank you. I think I have found them now. Are the z positions labled as blz
tlz trz and brz?

yes, that’s the per-arm settings.

David Lang